What are the reasons for the contamination of the reverse osmosis membrane of the ultrapure water equipment?
What are the reasons for the contamination of the reverse osmosis membrane of the ultrapure water equipment? Author: reverse osmosis membranes used in reverse osmosis system if the long-term, a large number of adsorption of pollutants deposited film element is the need to clean and ensure efficient operation. Contamination and cleaning are always a dynamic balance process, each cleaning needs to maintain a greater degree of cleanliness, so that the membrane elements can work more effectively. Today, the editor will introduce to you the solution to the contamination of the reverse osmosis membrane. After the system is operated for a period of time, if each membrane element is not cleaned in place and then works, the pollution will further accumulate, which can cause further flow of the membrane surface and blockage, and the cleaning agent cannot penetrate. At the same time due to the long-term pressure, the contaminants will be densely realized, which will cause the cleaning of the membrane to be very difficult to recover, leading to the scrap of the membrane. Membrane cleaning needs to use membrane cleaning agent, and the choice of membrane cleaning agent depends on the type of pollutant. Only a certain type of membrane cleaning agent can be used for the first type of pollutant, and it can be effective if it is carried out according to a certain cleaning process. There are some contaminants that are particularly obvious. Only targeted cleaning agents are used. Other cleaning agents often have no effect or are very slow. Avoid the pollution of reverse osmosis membrane: It is inevitable that the membrane system will be polluted during operation. But we can take some measures to reduce the degree of pollution and slow down the rate of pollution. 1. Improve the operating parameters of the membrane system, adjust the temperature, pressure, circulation flow rate and concentration factor, etc., so as to delay the decay rate of the membrane flux. 2. Choose appropriate membrane cleaning agent and correct membrane cleaning process to clean the membrane system in time and effectively. Don't wait for the accumulation of membrane system pollution to be very serious before cleaning, it is usually difficult to completely recover at this time. 3. Start with the improvement of the process and pretreatment, improve the quality of the feed, reduce the working load of the membrane as much as possible, and ensure that the feed liquid meets the entry standard of the membrane element.
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